(19)
(11) EP 0 986 281 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
27.09.2000 Bulletin 2000/39

(43) Date of publication A2:
15.03.2000 Bulletin 2000/11

(21) Application number: 99307055.6

(22) Date of filing: 06.09.1999
(51) International Patent Classification (IPC)7: H04Q 7/38
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 08.09.1998 US 149148

(71) Applicant: Nortel Networks Limited
Montreal, Quebec H2Y 3Y4 (CA)

(72) Inventors:
  • Periyalwar, Shalini
    Ottawa, Ontario K1N 7X2 (CA)
  • McGregor, Andy
    Kanata, Ontario K2L 2Z6 (CA)

(74) Representative: Berkson, Michael David 
Nortel Networks Intellectual Property Law Group London Road
Harlow, Essex CM17 9NA
Harlow, Essex CM17 9NA (GB)

   


(54) Method of performing progressive soft handoff in CDMA systems


(57) Methods and apparatus for progressive soft handoff of a mobile user from one base station to another in multi-channel CDMA systems provide for progressively decreasing the data rate from a "home" base station while simultaneously progressively increasing the data rate from the "new" base station.






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